System Engineer – Infrastructure (f/m/d)

GMX, WEB.DE & mail.com; Karlsruhe; Hybrid; EUR 60.000 - 80.000; Vollzeit

Benefits dieser Stelle

Internal and external training opportunities

Flexible working models

Subsidy for job bike leasing

Corporate benefits

Active health care services

Company pension scheme

Zusammenfassung

A global technology company located in Karlsruhe is seeking a System Engineer to manage their Loadbalancer platform. This role requires strong expertise in HAProxy and Envoy, with a focus on designing and operating infrastructure at scale. You'll work collaboratively across teams, optimizing performance metrics and implementing key security policies. The position offers a flexible working model, generous health benefits, and extensive training opportunities, all in a company culture driven by respect and appreciation.

Qualifikationen

• 5+ years of experience in designing and operating infrastructure at scale.
• Strong proficiency in GitOps tools and CI/CD pipelines.
• Excellent communication skills in English, able to advise stakeholders.

Aufgaben

• Design, operation, and continuous evolution of Loadbalancer platform.
• Define and implement rollout strategies via GitOps pipelines.
• Monitor and optimize key performance metrics.

Kenntnisse

HAProxy expertise

Envoy skills

GitOps tools proficiency

Programming (Lua, WASM, Python, Bash)

Communication skills

Ausbildung

Degree in Computer Science or equivalent experience

Tools

ArgoCD

GitLab Runners

Debian packaging

Jobbeschreibung

Join to apply for the System Engineer – Infrastructure (f/m/d) role at GMX, WEB.DE & mail.com

Are you ready to take ownership of a global Loadbalancer platform serving millions of users? As a System Engineer, you’ll architect, secure, and operate high-throughput infrastructure based on HAProxy and Envoy, all within a GitOps-driven environment. You’ll collaborate across teams and act as a technical advisor – your work will directly influence the reliability and efficiency of our production systems.

We operate at serious scale: 3.5 billion logins per day, hundreds of petabytes of storage, and nearly half an exabyte of internet traffic annually. Join a team that’s building a European alternative to email and cloud services, committed to privacy, digital sovereignty, and operating under European law.

Responsibilities

• You own the design, operation, and continuous evolution of our Loadbalancer platform.
• You define rollout strategies such as Canary Routing and Blue/Green deployments, and implement them via GitOps pipelines.
• You monitor and optimize key metrics like request rates, response times, and error rates.
• You establish and enforce security policies for TLS, SNI, header handling, rate limiting, and circuit breakers.
• You present architectural concepts and platform strategies to internal and external stakeholders.

Your profile

Do you have a degree in Computer Science or equivalent experience? Are you confident in designing and operating platforms in large-scale environments? Do you thrive in cross-functional collaboration and technical leadership? We believe the following skills and experiences will help you to be successful in this role:

• 5+ years of experience in designing and operating infrastructure at scale.
• Expertise in HAProxy and/or Envoy, including advanced configuration (ACLs, TLS termination, routing strategies).
• Strong proficiency in GitOps tools (e.g. ArgoCD, GitLab Runners), CI/CD pipelines, and secret management (e.g. Vault), as well as Debian packaging.
• Programming experience in Lua, WASM, Python, or Bash, along with strong debugging skills using logs, Prometheus metrics, and tracing tools.
• Excellent communication skills in English, with the ability to advise stakeholders and lead cross-functional initiatives.

🏢 Lived corporate culture: Flat hierarchies, a culture of respect and appreciation, signatories of the Diversity Charter, open communication and no dress code

🎓 Wide range of further training: Internal and external training opportunities, LinkedIn Learning, language courses, talent development programs, conferences and mentoring

💡TEC-Campus: Free choice between Linux, Mac, or Windows, slack days, conferences, lecture series, courses, open-source projects, community meetups and user groups

❤️ Active health care: Wellpass, free internal sports and fitness classes, health days, family & care support services, discounts at fitness centers, mental health first responder, fresh fruit and drinks for free

🚝 Mobility: Subsidy for job bike leasing, job ticket and relocation service if you live outside Germany

💻 Flexible working models: Home office options, flexible working hours and 30 days of vacation with the option for additional unpaid leave

💰 Financial benefits: Corporate benefits, company pension scheme, capital-forming benefits, occupational disability insurance and various partner discounts

🎉 Events: Summer and winter parties, sports tournaments and team events

Reference ID: 310

Seniority level

• Associate

Employment type

• Full-time

Job function

• Information Technology

Industries

• Technology, Information and Internet

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